24/05/2021

The Project

Investigating the relationship between species translocation and biodiversity.

Comparing human driven effects to ecological and evolutionary effects.

Two sub-projects:

  • Evolutionary/Species
  • Ecological/Community







Law and Morton, 1996

  • Predatory-Prey dynamics with Basal and Consumer species.
  • Size structured pool with separate time scales.

Early Results (1)

Stronger dependence on basal species than on consumer species in the pool.

Larger pools \(\implies\) larger communities, but non-trivially.

Size structure induces \(\perp\) food webs.

Early Results (2)

##    DatasetID Productivity1 Productivity2    ProdDiff      Winner
## 1       14 1     125.42370      126.7982  -1.3745517      Hybrid
## 2       19 1     162.73580      160.1915   2.5443294 Community 1
## 3       20 1     122.38829      130.3306  -7.9423479      Hybrid
## 4        5 2     266.12522      266.2753  -0.1501297      Hybrid
## 5        5 2     266.12522      282.6293 -16.5040712      Hybrid
## 6        5 2     266.27535      282.6293 -16.3539416      Hybrid
## 7       14 2      93.96649      123.9299 -29.9633981 Community 2
## 8       17 2     167.14026      182.0757 -14.9354200      Hybrid
## 9       20 2     116.32796      109.0136   7.3143753 Community 1
## 10      26 2     177.09200      182.1006  -5.0086387      Hybrid
## 11      27 2      32.11787       36.9325  -4.8146284      Hybrid
## 12      30 2     151.97244      138.8907  13.0817663      Hybrid
## 13      33 2     117.20331      183.8896 -66.6863357 Community 1
## 14       2 3     172.97277      150.5365  22.4362595      Hybrid
## 15       6 3     196.10556      230.7470 -34.6413960 Community 2

Early Results (3)

Uninvadability to assembly is not the same as uninvadability to dispersal.

Primary productivity does not seem like a great predictor.

When a hybrid community emerges, it seems to propagate to all islands, even if it does not persist.

Hybrid communities that do persist seem to be invadable.

Future Work

Currently:

  • Working on testing explicitly if the mass effects \(\implies\) invading the uninvadable.
  • Looking for indirect mutualisms/competitions (so far, former not apparent).
  • Modifying the pool (less connected, more mutual/competitive, self-regulation).

Later:

  • Include dynamics on the pool.
  • Integrate with evolutionary processes.
  • Add more spatial dimension to the islands.